Fenpropidin, 100 µg/ml, Cyclohexane, 5ml

2,3,7,8-Tetrachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

Difenacoum, 100 µg/ml, Acetonitrile, 1ml

N-Nitrosodiethanolamine, 100mg